Automobile lock



C. F. MURRAY.

AUTOMOBILE LOCK.

APPLICATION FILED MAY 22. 1917. RENEWED OCT. 2,1920.

1,422,221. Patented July 11, 1922 1 CHARLESF. MURRAY, 0]? EVANSTON, ILLINOIS.

AUTOMOBILE LOCK.

Specification of Letters Patent.

Patented July, 11, 1922.

Application filed May 22, 1917, Serial No. 170,124. Renewed- October 2; 1920. Serial'No. 414,338.

To all whom it may concern.

Be it known that I, CHARLES F. M RRAY, a citizen of the United States, and resident of Evanst-on', in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in AutomobileLocks, of which the following is a specification.

My invention relates to looks for vehicles and particularly to' a lock adapted to be applied to the transmission casing thereof.

An object in' the present construction is to provide a simple form of locking device which may be locatedwithin the transmissioncasing or. if desired, in the rear axle and by means of which the power transmitting shaft is securely and permanently locked against any forward movement of the vehicle. This provision, however, is ineffective unless the car can be moved a limited distance before the lock comes into action. This permits all the usual movements of the car 'as required by the municipalities when the car is left on the streets. It also permits the car. to be moved as required whenin public garages or other buildings.

- The present device whenvinlocked position will absolutely prevent extensive movement of, the car without disturbing the transmission casing. The arrangement is such that not only is the transmission shaft locked but the transmission casing is al'so locked against removal ofthe cover. Even though th'e'thief has plenty of time, access to the casing cannot be secured without destroying it.

The invention, will be more readily understood by reference to the accompanying drawing, wherein, V v

1 is a vertical sectional view through a transmission casing to which my improvement has-been applied;

Figs. 2, 3 ands: are sectional "views on the lines 2--2, 3-3, and 14 respectively of i Fig. 1; v

Fig. 5 is a bottom plan view showing the means for advancing the clutch spring into looking position, and k Fig. 6 is a bottom plan view showing the means forlocking the casing cover in place. In the drawings the transmission casing is shown at 10. Mounted therein are the usual 17, and consequently change speed gears which ,need not be specifically described. The drive shaft 11,

enters the casing and is connected to the englne. The driven shaft 12, extends rearwardly and is positively connected to the 7 drive wheels. Surrounding the shaft 12, and secured to the casing is a plate 13, having -a stop lug with a cylindrical extension 15.

mounted on a spline 16, carried by 12, is a worm gear 17, also having a cylindrical extension '18. Mounted within the Slidably cylindrical portion18, and anchored .to the powerful, helical spring" 22, which bear respectively against the cylin-- downwardly ex- 23, integral with I :the cover 24, of the transmission casing.

drical portion 15, and a tending wall or diaphragm As a means for advancing :the worm gear the clutch spring 19, I provide a bar 25, the lower surface of which is provided with teeth adapted to en- 14, thereon, and provided" 1e purpose in providing-the spring is to The worm gear the shaft gage the gear 17. As the bar is rigidly held the gear will be caused to advance as it is rotated. The bar is provided on its upper surface with inclined dovetailed portions 26, which-interfitwith similar portions on a member 27. On the sides of the bar 27, I provide guides 28, which engage .with ways in the wall 29. As the member 27, is cated it will be seen that the member 25,

reciprowill be raised and lowered into and out or engagement with the periphery of the worm 17. As a means for reciprocating the member27, I provide the spring30, and the bell crank 31, connected to a wire or cable 32, which is accommodated within an armored conductor 33. This is connected to a lock 34, which may be mounted at a suitable point in the vehicle. The tendency of the spring 30, is to move the parts to tl fie P0511 tion shown in the drawings, and when in 10. The long end 39, of the .lever 35, is also substantially as described.-.

lug 14.

this position the rotation of the shaft 12, into such position as to cause engagement of which follows movement of the car, will the projection on the spr1ng-w th said stop cause the advance of the spring'clutch 19, to prevent the rotation of theshaft, and into such position that it may engage the means for lockingsaid screw means substanh tially as described. I

As an additional precaution against tam- In an automobile lock, the combination paring, I provide, as best shown in Fig. 6, with the transmission casing and propeller means for locking the 'coveron the transshaft, of a worm gear slidably mounted on mission case. This means comprises'a lever the shaft, a resilient clutch member con 35, pivoted at 36,;to the cover, and to which nectedto and movable with said gear, a rack rods 37, 38, are connected. These rods eX- adapted to be moved into and out of entend in opposite directions and engage with gagement with said gear, and locking means suitable recesses in "the body of the casing for securing said rack in locked position,

connected to the member 27, and moves 5. In an automobile lock, the combination therewith under the action of the spring 30, with the transmission casing and propeller or of the locking'cable' 32. Thus itwill be shaft, of a wormgear slidably mounted on seen that when the parts are in locked pothe shaft, a ili t} l t h b r sition the cover of the transmission casing nected to andmovable with said gear, a

3.0 I at'the time of engagement, it is not thought tion is cut theparts will assume or remain f in locked position.

'ma be employed. bviously the construction modifications other than those herein discannot be removed; If' h l king 0nne c rack adapted-to be. moved into and out'of engagement with said gear, and locking As anadded precaution against unauthoring located at a distance, substantially as 128d removal of the car by running it backdescribed.

wards, I provide a lug 40, on the wor'm17, 6. In a vehicle lock, the combination of a and'a similar lug 41 ,.on the wall 23. If, casing having a closure, means for posiwhile thefpa'rts are in locked position, the 'tively looking a power transmitting element CflI'IlS attempted to be. run backwards these within said casing, and means for simultanetwo lugswill en age. Asthe speed at which ously locking the closure against removal, it may be move backwards willnot be great substantially as described. v

7. In a vehicle lock, the combination of a to be necessary to provide a resilient clutch casing. having .a closure, a shaft therein,

,member if such be found necessary, a vmeans in said casing for locking said shaft 1 spring s milar to the one indicated at 19 against rotation, and means operable by said locking means for securing said closure against removal, substantially as described.

8. In avehicle, the combination of a trac- "is icapable of closed and I do not wish to be limited other tion wheel .driving shaft, a' casing within than as indicated in the appended claims. which said shaft terminates, a cover for said I claim v 1. Inn vehicle lock, the combination of a ing the. rotation of said shaft, and means casing, a shaft, a clutch member in the form operable. simultaneously with said locking of a spring-mounted in the casing and means for preventing the removal of said adapted to arrest the rotation of said s'haft cover. when the'parts are in locked position,

without material shock, said spring being substantially as described.

I 9. In a device of the" class described, the for moving said spring into clutching posicombination ofa casing having a closure, a

' casing, a look within the casing for prevent tion in consonance with the rotation of the shaft, means in the jcasing for locking the shaft and after'a' redeterminednumber of shaft against rotation,-and means controlled scribed.

rotations of the s aft, substantially as de- 1 2.111 a vehiclelock, the combination of a "casing, a propeller shaft entering the casing, I

by the same look for securing said closure against removal when the parts are in locked position, substantially as described.

10. .An au oniobile locking device comprisheavy helical spring having a projection on fa relatively heavy spring, and a stop within in'gin combination a transmission casing, a "the casing, screw means for relatively movvpropeller shaft tenn-inating therein,a clutching saidspring and stop to bring'the same ng device adapted to engage the shaft and into such position as to prevent rotation of said casingxto prevent rotation of the prov .the shaft, and means for locking said screw peller shaft, means in said casing actuated means, substantially as described. by the rotation of said shaft for moving said 3. In a vehicle. lock, the combination with clutching device into. clutchin position fola casing having a stop, of a shaft connected lowing a predetermined number of revoluto traction wheels and projecting into said tionsof said shaft,'and,a lock for said last casing, a clutch 'in the form of a relatively named means.

' '11. An automobile locking device comprisone end, screw means for moving said spring 'ing in combination a transmission casing, a

propeller shaft terminating therein, a clutching device adapted to engage the shaft and said casing to prevent rotation of the propeller shaft, screw means actuated by the l\ rotation of said shaft for moving said clutching device into clutching engagement following a pre-determined number of revolutions of said shaft, and a lock for said screw means.

T. D. Borne R.

Signed at Chicago, Ill., this 16th day of 10 

